+size_t raw_ostream::preferred_buffer_size() const {
+ // BUFSIZ is intended to be a reasonable default.
+ return BUFSIZ;
+}
+
+void raw_ostream::SetBuffered() {
+ // Ask the subclass to determine an appropriate buffer size.
+ if (size_t Size = preferred_buffer_size())
+ SetBufferSize(Size);
+ else
+ // It may return 0, meaning this stream should be unbuffered.
+ SetUnbuffered();
+}
+
+void raw_ostream::SetBufferAndMode(char *BufferStart, size_t Size,
+ BufferKind Mode) {
+ assert(((Mode == Unbuffered && BufferStart == 0 && Size == 0) ||
+ (Mode != Unbuffered && BufferStart && Size)) &&
+ "stream must be unbuffered or have at least one byte");
+ // Make sure the current buffer is free of content (we can't flush here; the
+ // child buffer management logic will be in write_impl).
+ assert(GetNumBytesInBuffer() == 0 && "Current buffer is non-empty!");
+
+ if (BufferMode == InternalBuffer)
+ delete [] OutBufStart;
+ OutBufStart = BufferStart;
+ OutBufEnd = OutBufStart+Size;
+ OutBufCur = OutBufStart;
+ BufferMode = Mode;
+
+ assert(OutBufStart <= OutBufEnd && "Invalid size!");
+}
+